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Discussion Starter · #1 ·
the slab has buried radiant heating elements for our garage. The winters are as cold as -30 degrees F in northern Maine. I am going to install a below ground ( about 15 inches) composting pit with a wood door to keep away critters. the ground does freeze in winter down to about 4 feet in bad snow years. We do not want to mess up the heated garage or the foundation. How closely can I dig to the concrete slab? thank, roberta
 

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I assume the garage floor is insulated, not that it matters. I doubt the heat from a compost pile will have much affect on the garage floor or foundation. My concern would be from water in the pit.
 

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The radiant elements are in the slab and should be away from the edge. Your digging outside the garage should have no connection with the heating elements.
Ron
 

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Your garage floor will very likely be supported underneath with a foundation. This will rest on a footing that is 4' down.
Your excavation is highly unlikely to have any effect on the garage floor.
As you dig your pit, you will likely see the foundation wall.
 

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Discussion Starter · #7 ·
the garage is detached, the pit on the far side of the garage from the house. There is no meat in my compost. The only thing to fear is bears.....yes bears. They eat anything. and they can get into anything they want. We live in the woods in northern Maine. We have a large dog. So far...no termites this far north, just carpenter ants ...we already have those. mostly compost smells and has various flies. this plan has a vent pipe with a screen for fly contro.l the worms are a helpful hopeful guests.
 
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